Disazo dyes



United States Patent US. Cl. 260-184 4 Claims ABSTRACT OF THE DISCLOSURE Water-insoluble disazo compounds containing two phenyl-azo-aniline moieties joined by a CH CH SO CH CH attached to the nitrogen atom of the aniline coupler of each phenyl-azo-aniline moiety. The disclosed disazo compounds are useful as dyes for hydrophobic textile materials such as polyester fibers.

This invention relates to novel disazo compounds and, particularly, to water insoluble disazo dyes for hydrophobic textile materials.

The novel disazo compounds of the invention are characterized by the general formula wherein R is a monocyclic carbocyclic aromatic group of the benzene series having the structure wherein X represents lower alkyl, e.g., methyl, ethyl; substituted alkyl such as halogenoalkyl, e.g. chloromethyl, trifiuoromethyl; lower alkoxy, e.g. methoxy, lower alkanylamino, e.g. acetamido; nitro; halogeno, e.g. chloro, bromo; cyano; lower alkylsulfonyl, e.g. methylsulfonyl; bis(alkylsulfonyl), ,eg. 2,4-bis(-methylsulfonyl); substituted alkylsulfonyl, e.g. cyanoethylsulfonyl; carbamoyl; benzamido; benzylamino; N-alkylbenzylamino, e.g. N- phenylmethylamino; lower carbalkoxy, e.g carbethoxy; lower alkanoyl, e.g. acetyl; formyl; sulfamoyl; lower alkylsulfamoyl, e.g. methylsulfamoyl, ethylsulfamoyl; dicarboxylicacidimido, e.g. succinimido; thiocyano; lower alkylthio, e.g. methylthio; benzyloxy; benzoyl; combinations thereof; and m represents 0, 1, 2 or 3;

R and R represent monocyclic carbocyclic aromatic groups of the benzene series having the structure wherein Y may be the same or different in R and R and represents lower alkyl, e.g. methyl, ethyl; lower alkoxy, e.g. methoxy; lower alkanoylamino; e.g. acetamido; halogeno, e.g. chloro, bromo; benzylamino; N-alkylphenylamino, e.g. N-phenylmethylamino; dicarboxylicacidimido, e.g. succinimido; lower alkylthio, e.g. methylthio; benzyloxy; combinations thereof; and n represents 0, 1, 2, 3 or 4; and

R and R may be the same or different and represent hydrogen or an alkyl radical, preferably lower alkyl, i.e. from 1 to 4 carbon atoms, being unsubstituted or substituted such as hydroxyalkyl, e.g. hydroxyethyl, polyhydroxyalkyl, e.g. 2,3-dihydroxypropyl, lower alkoxyalkyl, e.g. methoxyethyl, cyanoalkyl, e.g. cyanoethyl, cyanoalkoxyalkyl, e.g. beta-cyanoethoxyethyl, lower alkanoyloxyalkyl, e.g. acetoxyethyl, lower carbalkoxyalkyl, e.g.

carbethoxyethyl, halogenoalkyl, e.g. chloroethyl, betachloropropyl, beta-bromoethyl, hydroxyhalogenoalkyl, e.g. beta-hydroXy-gamma-chloropropyl, lower alkylsulfonylalkyl, e.g. methylsulfonylethyl, lower alkyl-OCOOCH CH e.g. CH OC0OCH CH carbamoylalkyl, e.g. carbamoylethyl, lower alkylcarbamoylalkyl, e.g. ethylcarbamoylethyl, carboxylic acid imidoalkyl, e.g. succinimidoethyl; benzyl; phenoxyalkyl, e.g, beta-phenoxyethyl; lower alkylsulfonamidoalkyl, e.g. methylsulfonamidoethyl; carbamatoalkyl, e.g. phenylcarbamatoethyl; and the like.

The disazo compounds of the invention are prepared by coupling the conventional diazonium salts of compounds having the formula (II) RNH with unsymmetrical coupling components having the formula wherein R :and R may be the same or different and R and R may be the same or different but either R must be different than R or R must be different than R or with symmetrical coupling components having the formula wherein R =R and R =R and wherein R, R R R and R are defined as set forth above with reference to Formula I.

The unsymmetrical couplers of Formula III are prepared by reacting one mole of an appropriately substituted aryl amine with one mole of divinylsulfone in the presence of a catalyst such as acetic acid and contacting the reaction product, a vinylsulfonylethyl aryl amine, with one mole of a different aryl amine, as set forth in the following illustrative sequence:

R2 R HoAc ArN\ (CH2=CH)2S02 AFN H ogmsonon=om a Ar N H lHoAc ArN /NAr 0 11480 02114 wherein Ar and Ar represents either R or R of Formula I wherein R and R are the same or different and R and R are the same or different but either R is different than R or R is different than R and are defined as set forth in Formula I.

The symmetrical couplers of Formula IV are prepared by reacting two moles of an appropriately substituted aryl amine with one mole of divinylsulfone in the presence of 4 acetic acid catalyst, as set forth in the following illustrahardened to a glass. Attempts to crystallize it from ethanol tive sequence: were unsuccessful. The coupler had the structure:

R (l' R 0 114011 HO 0 2H4 o H H lHoAe 2 S0202 4 CouplerC Rm PREPARATION OF SYMMETRICAL DYES ArN\ )sO: Example 1 o H 1 4 2 3 2 A i 1 2 3 An amount of 6.9 g. p-nitroaniline was dissolved in 5.4 g il g B F aildlwherem R t R R cone. sulfuric acid and 12.6 ml. water. This solution was an are e ne oured onto 50 of ice, and a solution of 3.6 of sodih following examples will serve to illustrate the prep Em nitrite in 8 r nl. water was added all at onci. The diarat1on of representatrve couplers and drsazo compou azotization was stirred at 5 for 1 hr. resulting in almost of the mvemlon- AS W111 be Seen from the examples the complete solution. After filtration, the diazonium solution substiteenis X, Y, R2 and R3 Set forth in Formula I Serve was added to a chilled solution of 7.76 g. of bis[Z-(N- Pnmanly as auxochrome groups to control the Color of ethyl-rn-to1uidino)ethyl]sulfone in 50 ml. 1:5 acid (1 part the disazo compoundpropionic acidz5 parts acetic acid). The solution was neu- PREPARATION OF S ICAL OU LERS tralized to a brown color with solid ammonium acetate and after two hours was drowned in water. The precipigg ggfiggigfiggg' tated dye was filtered, washed with water and dried. It

dyed cellulose acetate, polyesters and nylon bright orange An amount of 27.0 g. N-ethyl-m-toluidine, 11.8 g. dishades and showed exceptional sublimation fastness when vinylsulfone, 5 cc. glacial acetic acid, and 50 cc. toluene dyed on polyester fibers. The dye had the structure:

was refluxed for 24 hr. The toluene and acetic acid were Example 2 removed under vacuum and the residue taken up in 150 A n amount of 3.6 g. sodium mtrite was added to 50 of ethanol i solunon.was chlued for 2 at near ml. of cone. sulfuric acid, keeping the temperature below 0 and i whlte crystalhne product was Collected by 80 C. To the solution was added 100 ml. 1:5 acid below filtration. Yield 21.4 g. M.P. 5861. It had the structure: 20o C- After further cooling to 50 C 636 g.

02H: 2 1', 10 aniline was added followed by 100 ml. of 1:5 acid. This solution was stirred for 2 hr. at 0-5 C. and then added H so 0 H to a solution of bis[2-(N-beta-hydroxyethyl-m-toluidino) H3 2 4 2 ethyl1sulfone in 50 ml. 1:5 acid. The solution was neucoupler A tralized to a brown color on Congo Red paper with solid PREPARATION OF BIS[2 (N BETA HYDROXYETH ammonium acetate. After two hours the solution was drowned in water and the precipitated dye washed with YLM'TOLUIDINO)ETHYL] SULFONE water and dried. It dyed polyester, cellulose acetate and The above procedure was repeated, substituting N-betanylon fibers bright yellow shades. The dye showed outhydroxyethyl-m-toluidine for N-ethyl-m-toluidine. The standing sublimation fastness on polyester fiber. It had the product had the structure: structure:

6213:4011 Hocun Example 3 A diazonium solution was prepared as in Example 2, H so substituting 8.60 g. of 2-chloro-4-nitroaniline for the p- CH3 2 4 2 2 4 chloroaniline. This solution was added to 7.76 g. bis[2- CouDlerB (N-ethyl-m-toluidino)ethyl]sulfone in 50 ml. 1:5 acid.

The resulting solution was neutralized to brown on Congo PREPARATION OF BIS[2-(N-BETA-HYDROXYETH- YLANILINO)ETHYL]SULFONE Red paper wlth ammonium acetate and coupled for 2 hours. The solution was drowned in water and filtered.

An amount of 31.0 g. of Z-anilinoethanol, 11.8 g. di- The precipitate was filtered, washed with water and air vinylsulfone, 5 cc. glacial acetic acid and 50 cc. toluene dried. It gave bright scarlet dyeings on polyesters which was refluxed for 24 hours. The solvents and unreacted had outstanding resistance to sublimation. The dye had starting materials were distilled off leaving a residue which the structure:

5 6 Example 4 Example 6 A diazonium solution was prepared as in Example 2, An amount of 3.97 g. of the dye obtained in Example substituting 11.80 g. of 2-methylsu1fonyl-4nitroaniline for 5 was taken up in 25 ml. pyridine. 2.0 g. acetyl chloride the p-chloroaniline. The diazonium solution was added to was added dropwise and the solution was heated for 1 a solution of 7.76 g. bis[2-(N-ethyl-m-toluidino)ethyl] hour on the steam bath at 8590. The dye was represulfone in 50 ml. 1:5 acid. The reaction mixture was neucipitated by drowning in dilute hydrochloric acid and tralized to a brown in water and filtered. The dye which was filtered and washed. It gave orange, sublimation fast precipitated was washed with water and air dried. It gave dyeings on polyesters with good light fastness. It had the structurei CH3OC0CH4 violet shades of good light fastness and excellent sublimation fastness on polyesters. The dye had the structure:

CzHs CzH5 C2H4SO2C2H4 (g CHaSO: H3 H3 CH3SO2 Example 5 The disazo compounds illustrated in the following table To a solution of 1070 of coupler c in 50 1:5 were prepared by the procedure illustrated in Examples acid was added a diazonium solution prepared from 8.60 g. 25 1 to above Thus the .appropnate compounds of For- 2-chloro-4-nitroaniline as in Example 1. The dye thus mule H were cqupled Wlth Suitable compounds of obtained gave bright orange dyeings on polyesters of E E E ggi g compounds of Formula I wherein excellent sublimation fastness. It had the structure: an

Example Substituent (x) on R R, R R R Color 7 p-N 0 g m-tolylene C H; C Hg C N Orange, 8. p-N O 1 m-tolylene -CHzCH2 Cl Do. 9. p-NO z m-tolylene CH CHgO CH D m-tolylene -CH:CH2O CO CH: D0.

0 O CH;

m-tolylene C HzCHgN Do.

0 O C H:

m-tolylene -CH,C H O 0 0111 Do.

m-tolylene O H CH Br Do.

m-tolylene CH1C H, C O NH; Do.

m-tolylene H2O H230: 0 a 0- 16 p-NO; m-tolylene CH;CHN Do:

17 p-No, m-tolylene CH:CH:OCONH Do. 18 2-NO24-C1 m-tolylene CzH5 Red. 19... 2-Cl-4-N O phenylene C H5 Scarlet, 20.. 2,6-di-Cl-4-N 0 g m-tolylene C 2H5 Yell ow-brown. 2-0 H3SO2-4-N O; m-tolylene CZH Red-violet. 22--. None m-tolylene -C;H5 Yellow. 23-- o-tol ylene -H Yellow-orange. 24 m-tolylene C 2H5 Orange. 25 m-tolylene -C2Hs Yellow. 26- m-tolylene CzH5 Do.

m-Cl-phenylene -C2H5 Do. 28. o-Cl-phenylene H Do. 29 2-0 G Ha-5-NH C 0 C Hz-phenylene -CH Red-yell ow: 3 2-0 0 H3-5-C Ha-phenylene -CzH5 Orange. 31- p O; 2,5-d1-O C H -phenyleue -CHs Red-orange. 32- p-C H; C O NH m-tolylene CxHa Yellow. 33- -N 01 111-0 CHa-phenylene -C2H5 Orange. 34. 2,4-di-CH SO g m-tolylene C2H5 Red. 35. p-C F3 m-tolylene -C2Hs Yellow. 36. p-SO1N(CHQ); m-tolylene -C2Hs Do. 37. 2,4-di-N O z-6-CzH5NHSO m-tolylene -C2Hr Violet. 38. 4-0 H; S 0 -2-01 m-tolylene C 2H Orange. 39- 2,4-di-N 02-4-01 m-tolylene -C2Hs Violet. 40. 4-CH3 C O -2-Cl mtolylene CH.-, OranGe. 41 4-CHO m-tolylene CzH5 Do.

CHz-C O 42 p- N m-tolylene -CgH Do.

TABLE- continued Example Substltuent (x) on R R', R R R Color 43 p-C H; m-tolylene -C;H Yellow.

44 p--O- m-tolylene -C=H; Do.

45 p-Q-SO; m-tolylene C;Hs Orange-yellow.

46 pQ-CO- m-tolyleno CzH5 Do.

47 13-0 0 NH1 m-tolylene C=Hs Yellow 48 p-CiHiO C O m-tolylene C=H Do.

PREPARATION OF UNSYMMETRICAL DYES PREPARATION OF UNSYMMETRICAL COUPLERS Example 49 An amount of 25.3 g. N-ethyl-N-beta-vinylsulfonylethyl- The diazonium solution was prepared in exactly the m-toluidine, 15.5 g. N-ethyl-m-chloroaniline, 5 ml. acetic same manner as in Example 1 and added to a solution acid and 50 ml. toluene were refluxed for 24 hr. The of 8.16 g. of coupler D in 50 ml. 1:5 acid. The reaction toluene and acetic acid were removed under vacuum and mixture was neutralized to brown on Congo Red paper /C:Hr C1H|\ the residue crystallized from ethanol. The coupler had the with solid ammonium acetate and allowed to couple 2 structure: hr. The solution was drowned in water and the precipi- ClHb C91 tated dye was filtered, washed with water and air dried. The product dyed polyesters, nylon and cellulose acetate bright orange shades having excellent sublimation fastolfltsoiciHi mess on polyesters. The dye had the structure of the above u formula.

CW1)! D Example 50 An amount of 29.9 g. 2,5-dimethoxy-N-ethyl-N-beta- A diazonium solution was prepared from p-chloroanivinylsulfonylethylaniline, 13.7 g. 2-anilinoethanol, 5 ml. line as described in Example 2 using the same quantities OCH:

I CIHQ HOCSHI C IHlSOICIHI O C H:

acetic acid and ml. toluene were refluxed together for of reagent and it was added to 8.72 g. of coupler E in 24 hr. The toluene and acetic acid were removed under 50 50 ml. 1:5 acid. After neutralization and coupling for 2 reduced pressure and the viscous oil obtained was used hr. a dye was precipitated and dried which gave bright without further purification. The coupler had the strucyellow-orange shades on polyesters, nylon and cellulose m acetate and had excellent sublimation fastness on poly- OCH esters. The dye had the structure of the above formula.

(32H5 HOGH4 The disazo compounds in the following table were Q prepared by the procedure illustrated in Examples 45 and 46, above. Thus, the appropriate compounds of Formula 5 CIHIS i Z B 11 were coupled with suitable couplers of Formula III to obtain the compounds of Formula I R =R and R mums: E and R may be the same or ditferent.

TABLE Example Substltuents (x) on R R Ill R R Color m-tolylene --O;Hs 011140151 phenylene Orange. rn-chlorophenylene C|H ON C111 m-tolylene Red-orange. o-ehlorophenylene H 0 H; m-tolylene Scarlet. o-tolyleno H 0 H; m-tolylene 2-0 G11 -5-OHs-phenylene CHQO H301 0:3 m-tolylene Red-violet; 2-O0Hr5-NHCOOH|-phenylene CHIOHsOCH; C,H m-tclylene Orange. m-OOH phenyIene CHQCHgOOOC-Ha 03H! mtolyleno Orange.

0 O C H:

phenylene CHaCmN 0 H; m-tolylene Yellow-orange:

C 0 0 HI 59 p-ON phenylene CHaOHgOOQOgHs 0 H; m-tolylene Yellow.- 60 2,4dl-OH1SO; phenylene OHgOHaB! 03H: m-tolylene Red. 61- OH phenylene OHgOHiBOiOH: 01H; rn-tolylene Yellow.- 62. phenylene OHflOHiOONHfl CQH: m-tolylene Orange.

63--. F; phenylene OHiOHiOI-I OIHI m-tolylene Yellow.

TABLEContinued Example substituents (x) on R R R R R Color 64 p-SO,N(OHa)i Dhenylene OHQCHIN 0 H; m-tolylene Yellow-orange.

65 fi-GHsSOg-Z-Ol phenylene CHsCHaOC ONE-Q C Hu m-tolylene Orange.

0 Hr-C O 66 p- /N- phenylene 01H; 0111401 m-tolyleue Yellow.

The disazo compounds of the invention can be used for dyeing textile materials, including protein and synthetic polymer fibers, yarns and fabrics, giving a variety of fast brilliant yellow to violet shades, including orange, violet, red and scarlet, when applied thereto by conventional dye methods. The disazo compounds have high affinity for cellulose ester, polyester, and nylon fibers. When the compounds are used for dyeing such hydrophobic materials, they should be free of water-solubilizing groups such as sulfo and carboxyl. In general, the dyes have excellent fastness, for example, to light, washing, gas (atmospheric fumes) and sublimation. The dyes are outstandingly sublimation resistant on polyesters.

As described above, the present disazo compounds have the characteristic structure of Formula I. This dis- 3 tinctive structure imparts unexpected properties to the compounds, including the above-described light fastness and sublimation resistance. Thus, the compounds of the invention, in general, possess superior properties when compared with similar, but distinct, dyes when tested by methods such as described in the A.A.T.C. Technical Manual, 1964 edition, depending in part upon the particular dye used and the fiber being dyed.

The compounds of the invention can be used for dyeing ester, acrylic, polyamide, etc., fibers in the manner described in U.S. Patents 2,880,050, 2,757,064, 2,782,187 and 2,043,827. The following example illustrates a method by which the disazo compounds of the invention can be used to dye polyester textile materials.

0.1 g. of the dye is dissolved in the dye pot by warmpound. Thus, for example, all the dyes will not have the same degree of utility for the same material. For example, the substituents X and Y and the substituents R and R as mentioned above, serve primarily as auxochrome groups to control the color of the disazo compound.

Polymeric linear polyester materials of the terephthalate type are illustrative of the linear aromatic polyester textile materials that can be dyed with the new azo compounds of our invention. The terephthalate fibers sold under the trademarks Kodel, Dacron, and Terylene, for example, are illustrative of the polyester textile materials that can be dyed. Kodel polyester fibers are more particularly described in U.S. Patent 2,901,446. Dacron and Terylene polyester fibers are described, for example, in U.S. Patent 2,465,319. The polymeric linear polyester materials disclosed in U.S. Patents 2,945,010, 2,957,745 and 2,989,363 for example, can be dyed. The linear aromatic polyester materials specifically named have a melting point of at least 200 C.

Nylon, in fiber, yarn and fabric form, is representative of polyamides which can be dyed with the disazo compounds.

The invention has been described in considerable detail with particular reference to certain preferred embodiments thereof, but it will be understood that variations and modifications can be effected within the spirit and scope of the invention as described above and as defined in the appended claims.

We claim:

1. A disazo compound having the formula ing in 5 cc. of ethylene glycol monomethyl ether. A 2% sodium-N methyl-N-oleyl taurate and 0.5% sodium lignin sulfonate aqueous solution is added, with stirring, until a fine emulsion is obtained. Water is then slowly added to a total volume of 200 cc. Then, 3 cc. of Dacronyx (a chlorinated benzene emulsion) are added and 10 grams of a textile fabric made of Kodel polyester fibers are entered. The fabric is worked 10 minutes without heat and then for 10 minutes at 80 C. The dye bath is then brought to the boil and held at the boil for one hour. Following this, the fabric is rinsed in warm water, then scoured in aqueous 0.2% soap, 0.2% soda ash solution. After scouring, the fabric is rinsed with water and dried. Accordingly, since the compounds of the invention are water-insoluble, they can be applied from aqueous dispersions in the manner of the so-called dispersed dyes. However, coloration can also be effected, for example, by incorporating the compounds into the spinning dope and spinning the fiber as usual. The compounds of the invention have varying utility as dyes. The degree of utility varies, for example, depending upon the material being dyed and the formula of the disazo com- Ya. Yo. Xon

wherein:

X is lower alkyl, lower alkoxy, trifluoromethyl, lower alkanoylamino, nitro, chlorine, bromine, cyano, lower alkylsulfonyl, cyanoethylsulfonyl, phenylsulfonyl, carbamoyl, benzamido, lower carbalkoxy, lower alkanoyl, formyl, sulfamoyl, lower alkylsulfamoyl, succinimido, thiocyano, benzoyl, lower alkylthio, or phenoxy;

mis0,1,2or3;

Y is lower alkyl, lower alkoxy, chlorine, bromine or lower alkanoylamino, each Y being the same or different;

nis 0, l or 2; and

R and R are the same or different and each is hydrogen; lower alkyl; lower alkyl substituted with lower alkoxy, hydroxy, chlorine, bromine, cyano, lower alkanoyloxy, lower carbalkoxy, lower alkylsulfonyl, lower alkyl-OCCO-, carbamoyl, lower alkylcarbamoyl, phthalimido, succinimido, phenoxy, phenylcarbamoyloxy, or lower alkylsulfonamido; or benzyl.

2. A disazo compound according to claim 1 wherein 3,446,791 1 1 1 2 X is nitro, chlorine, bromine, cyano, lower alkylsulfon- 4. A disazo compound according to claim 1 having yl, trifiuoromethyl or carbamoyl; the formula m is 1,2 or 3; and 10 wherein R and R are the same and each is Z-hydroxy- R and R each is lower alkyl or lower alkyl subethyl or Z-acetoxyethyl.

stituted with hydroxy, chlorine, bromine, cyano or lower alkanoyloxy. 3. A disazo compound according to claim 1 having the formula 15 (10m H: H: (20m wherein )m is 4-nitrophenyl, 2-chloro-4-nitrophenyl, or Z-methylsulfonyl-4-m'trophenyl.

References Cited UNITED STATES PATENTS 1,973,636 9/ 1934 Lantz 260-184 1,976,010 10/1934 Dahlen 2-60-184 1,978,783 10/ 1934 Dahlen 260-184 CHARLES B. PARKER, Primary Examiner.

G. F. WARREN, Assistant Examiner.

US. Cl. X.R. 

